private Func <DbDataReader, object> GetCreateDelegate()
{
if (_mapperCollection.HasFactory(_type))
{
return(dataReader => _mapperCollection.GetFactory(_type)(dataReader));
}
var constructorInfo = _type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).SingleOrDefault(x => x.GetParameters().Length == 0);
if (constructorInfo == null)
{
return(_ => null);
}
// var poco=new T()
var constructor = new DynamicMethod(Guid.NewGuid().ToString(), _type, new[] { typeof(DbDataReader) }, true);
var il = constructor.GetILGenerator();
il.Emit(OpCodes.Newobj, constructorInfo);
il.Emit(OpCodes.Ret);
try
{
var del = constructor.CreateDelegate(Expression.GetFuncType(typeof(DbDataReader), typeof(object)));
return(del as Func <DbDataReader, object>);
}
catch (Exception exception)
{
throw new Exception("Error trying to create type " + _type, exception);
}
}
private Func <DbDataReader, object> GetCreateDelegate()
{
if (_mapperCollection.HasFactory(_type))
{
return(dataReader => _mapperCollection.GetFactory(_type)(dataReader));
}
if (_constructorInfo == null)
{
return(_ => null);
}
var create = CreateObjectFactoryMethodWithCtorParams(_constructorInfo);
var parameters = _constructorInfo.GetParameters()
.Select(x => MappingHelper.GetDefault(x.ParameterType))
.ToArray();
return(x => create(parameters));
}